Boiler-furnace



(No Model.)

B. BARRETT. BOILER FURNACE.

No 404,378. Patented June 4,, 18 89..

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' fastened by latches b in the usual manner,

' UNITED STATES PATENT OFFICE.

EDNVARD BARRETT, OF FALL RIVER, MASSACHUSETTS.

BOILER-FURNACE.

SPECIFICATION forming part of Letters Patent No. 404,378, dated June 4,1889.

Application filed March 11, 1889.

To aZZ whom it may concern:

Be it known that I, EDWARD BARRETT, of Fall River, in the county ofBristol, State of Massachusetts, have invented a certain new and usefulImprovement in Boiler-Furnaces, of which the following is a descriptionsufficiently full, clear, and exact to enable any person skilled in theart or science to which said invention appertains to make and use thesame, reference being had to the accompanying drawing, forming part ofthis specification, in which- Figure 1 is a front elevation of aboilerfurnace provided with my improvement; Fig. 2, a top plan view, thebody of the furnace being broken away; and Figs. 3, at, and 5, enlargedsectional views illustrating certain details of construction.

Like letters and figures of reference indicate corresponding parts inthe different figures of the drawings.

My invention relates to means whereby the doors of boiler-furnaces maybe simultaneously opened when it becomes necessary to damp the fires;and it consists in certain novel features, as hereinafter fully setforth and claimed, the object being to produce a simpler, cheaper, andmore effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawings, A represents the furnacefront, and B O the doors. Thedoors are the doors B C of each set opening outward in oppositedirections. Two parallel horizontally-arranged rods (1 f are disposedabove the doors, said rods being supported by and fitted to slidelongitudinally between rolls 9, (see Fig. 5,) journaled in brackets h,which are secured at suitable intervals to the furnace-front. The rods df are connected at one end by a chain't', which passes overa pulley 7t,journaled on the furnace-front. To the outer end of each latch 11 on thedoors B is secured a chain m, the opposite ends of said chains beingsecured to the rod (1 at points at the rear of the vertical line of thedoorhinges. Similarly-disposed chains 13 connect Serial No. 302,818. (Nomodel.)

the latches of the doors 0 with the rod f at points in the vertical lineof the door-hinges, sufficient length of chain m 19 being thus suppliedto allow a single door to be opened in the usual manner without movingsaid rods d f. Two verti eally-arranged hand-levers r t are pivoted bytheir lower ends to the furnace-front at the side opposite the pulley k,the upper ends of said levers working in a guide-bracket D. The lever ris pivoted at a: to the end of the rod d, and the levert at w to thecorresponding end of the rod f: The rods d f as disposed in the bracketsh are outside the plane of the doors B O, as shown in Fig. 2.

In the use of my improvement to open the doors of the furnace the leverr is drawn outward into the position of levert in Fig.1.

This causes the rod 01 to move from right to left and the rod f fromleft to right, as view in Fig. 1. The chains m 19, secured to said rods,unlatch the doors as the rods are thus moved and swing them open inopposite directions in a manner that will be readily understood withouta more explicit description. In moving the rods to open the door asdescribed the lever 2. is moved into the position of lever r in Fig. 1,and to close the doors again said lever t is again forced outward,causing the rods to move back into their original position.

It will be seen that by the use of my device the furnace-doors can bequickly and easily opened when it becomes necessary from any cause tosuddenly damp the fires and stop steam from generating. It will beunderstood that one rod only, as (Z, is employed when the doors B 0 openin the same direction.

Having thus explained my invention, what I claim is 1. A device foropening furnace-doors, consisting of a rod arranged to slide on thefurnace-front and connected with said doors by cords or chains,substantially as described.

2. In a device of the character described, the combination of a rodfitted to slide on the furnace-front in the direction the furnace-doorswings, with a chain connecting the rod with the door-latch, and a leverfor actuating said rod, substantially as described.

3. In a device of the character described, the combination of a furnace,a rod fitted to slide in guide-rolls on the front thereof, a chainconnecting the door-latch with said rod at a point opposite the centerthereof, and a lever pivoted to said rod and the furnace-front,substantially as and for the purpose set forth.

4. In a device of the character described, the combination of a furnaceprovided with doors opening in opposite directions, two rods fitted toslide in the furnace-front and having their corresponding ends connectedby a chain passing over a fixed pulley, chains connecting the latches ofdoors opening in like directions with one of said rods, and anactuating-lever for each rod, whereby the doors may be opened or closedas said rods are moved, substantially as described.

5. The furnace A, provided with doors B, having latches b, incombination with the rod cl, fitted to slide between rolls 9 on thefurnace-front, the chains m, connecting said latches and rod, and thelever a", for actuating said rod, substantially as described.

6. The furnace A, provided with doors B 0, having latches b, incombination with the rods d f, fitted to slide between rolls g on thefurnace-front, the chains on 1), connecting said latches and rods, thechain '5 and pulley k, and the levers r 1, all being arranged to operate substantially as described.

EDWARD BARRETT.

Witnesses K. DURFEE, O. M. SHAW.

